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Integrated vibration signal complete period equal phase high speed synchronous data collection system

A data acquisition system and vibration signal technology, applied in the direction of instruments, etc., can solve the problems of complicated circuit connection, which is not conducive to improving the stability and reliability of the system, and achieve the requirements of improving stability and reliability, ensuring synchronization, and saving energy. Effects of bus slots

Inactive Publication Date: 2003-04-16
ZHEJIANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In this way, the number of circuit boards is relatively large, and the connection between circuits is also relatively complicated.
On the one hand, it occupies more bus slots of the industrial computer, and when the slots of the industrial computer are insufficient, an additional chassis is required
On the other hand, it is not conducive to improving the stability and reliability of the system

Method used

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  • Integrated vibration signal complete period equal phase high speed synchronous data collection system
  • Integrated vibration signal complete period equal phase high speed synchronous data collection system
  • Integrated vibration signal complete period equal phase high speed synchronous data collection system

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Embodiment Construction

[0021] 1. The working principle of the acquisition system

[0022] Such as figure 1 As shown, the signal is taken from the sensor, the AC and DC signals are separated by the conditioning circuit 1 and amplified respectively, and sent to the A / D conversion circuit 2. After the key-phase signal processing circuit 3 doubles the frequency of the key-phase pulse, it is used as an external trigger signal of the A / D conversion circuit, so that the entire cycle sampling of the vibration signal can be realized. The result of A / D conversion is temporarily stored in the first-in-first-out (FIFO) memory 4, and the effect of the read-write control circuit 5 is to correctly control data from the A / D conversion circuit to transfer to the FIFO memory, when the data in the FIFO is half full (reaching half of the FIFO capacity), it can send a signal to the industrial computer, and the industrial computer reads the data, and further processes and stores them.

[0023] 2. Vibration signal condi...

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Abstract

The acquisition system includes the conditioning circuit and the key phase signal processing circuit. The conditioning circuit can separate AC signal from DC signal. The one end of the conditioning circuit is connected to the vibration signal of the sensor. The another end of the conditioning circuit is connected to the A / D conversion circuit through FIFO storage, connecting to ISB bus. The one end of the circuit for processing the key phase signal is connected to the key phase signal through double frequency, connecting to the A / D conversion circuit. The read / write control circuit is connected to the A / D conversion circuit and the FIFO storage respectively. In the invention, the conditioning circuit, the circuit for processing the key phase signal and the A / D conversion circuit are integrated in one piece of circuit board.

Description

technical field [0001] The invention relates to a vibration device for measuring solids through direct conduction to a detector, and is a high-speed synchronous data acquisition system for integrated vibration signals with full periods and equal phases. Background technique [0002] Vibration signals of rotating machinery contain rich state information. The most common method for measuring the vibration of rotating machinery is to install vibration sensors on bearings, couplings, etc., and convert the vibration into electrical signals. The electrical signals are transformed by a certain conversion circuit (such as filtering, amplification, etc.), The sampling circuit converts the analog quantity into a digital quantity, and then sends it to the computer for further processing. Vibration measurements on rotating machinery must meet the following requirements: [0003] 1) AC signal and DC signal are sampled separately; [0004] 2) The sampling freq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M7/00
Inventor 杨世锡任达千严拱标康飚郑林生吴昭同
Owner ZHEJIANG UNIV